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AZIMUTH angle used in advanced modes (see the Four-Circle Reference) and the incidentX-ray wavelength, LAMBDA ,are also listed.The angular positions listed above are the user angles. You set user angles duringdiffractometer alignment to satisfy the premises of the geometry calculations, such asthe positions of the zeroes of the angles. Dial angles keep track of hardware limitsand prevent complete loss of angles from alignment errors or computer failure. Thedial angles are generally made to agree with a physical indicator on each motor, suchas a dial. User angles are related to the dial angles through the equation:user = sign × dial + offsetRedefining a user angle changes the internal value of offset. Dial angles are directlyproportional to the values contained in the hardware controller registers. The sign ofmotion is set in the configuration file by the <strong>spec</strong> administrator and normally isn’tchanged.The set_dial motor position macro is used to set the dial position of a motor. Theargument motor is the motor number or mnemonic. All motors have short mnemonics,such as tth , th , chi ,and phi .4.FOURC> set_dial tth 24.526Mon Feb 15 01:42:10 1994. Two Theta dial reset from 0 to 24.526.5.FOURC>The set motor position macro is used to set the user position of a motor (i.e., tochange offset). If you had a slit motor with mnemonic ts1 ,you might enter5.FOURC> set ts1 .5Mon Feb 15 01:43:31 1994. Top Slit1 reset from 0 to .5.6.FOURC>The wa (where all) macro lists both the user and dial positions of all configuredmotors.6.FOURC> waCurrent Positions (user, dial)Two Theta Theta Chi Phi Top Slit1 Bot Slit1tth th chi phi ts1 bs124.6310 12.3155 90.0000 0.0000 0.5000 -0.500024.5260 12.2155 89.7865 0.0950 0.5000 -0.50007.FOURC>8 USER MANUAL AND TUTORIALS INTERIM WORK-IN-PROGRESS (8/16/01) NOT FOR GENERAL DISTRIBUTION
<strong>spec</strong> also keeps track of software motor limits. These limits are always checkedbefore any motors are moved. The lm macro lists these limits in both user and dialangles, as well as the current positions of the motors.7.FOURC> lmUSER Limits (high, current, low):Two Theta Theta Chi Phi Top Slit1 Bot Slit1180.1050 90.1000 135.2135 179.9050 5.0000 0.000024.6310 12.3155 90.0000 0.0000 0.5000 -0.5000-179.8950 -89.9000 -134.7865 -180.0950 0.0000 -5.0000DIAL Limits (high, current, low):Two Theta Theta Chi Phi Top Slit1 Bot Slit1180.0000 90.0000 135.0000 180.0000 5.0000 0.000024.5260 12.2155 89.7865 0.0950 0.5000 -0.5000-180.0000 -90.0000 -135.0000 -180.0000 0.0000 -5.00008.FOURC>The macro set_lm motor low high changes the software limits for a single motor.The values for low and high are given in user angles (although they are stored internallyin dial angles).The wm motor [ motor ... ] macro lists complete information for up to six motorsgiven as arguments.8.FOURC> wm tth thTwo Theta ThetatththUserHigh 180.1050 90.1000Current 24.6310 12.3155Low -179.8950 -89.9000DialHigh 180.0000 90.0000Current 24.5260 12.2155Low -180.0000 -90.00009.FOURC>Once the diffractometer has been aligned, you can move to any allowed reciprocalspace position using the br H K L(Bragg) macro.INTERIM WORK-IN-PROGRESS (8/16/01) NOT FOR GENERAL DISTRIBUTION USER MANUAL AND TUTORIALS 9
Page 1 and 2: spec X-Ray Diffraction SoftwareUSER
Page 3 and 4: specX-Ray Diffraction SoftwareCerti
Page 5 and 6: TABLE OF CONTENTSUSER MANUAL AND TU
Page 7 and 8: Reciprocal Space Macros ...........
Page 9 and 10: Preface For the Interim ManualWe ap
Page 11 and 12: USER MANUAL AND TUTORIALS
Page 15 and 16: files is then identified (/usr/loca
Page 17: denotes variable parameters you sup
Page 21 and 22: 13.FOURC> mvr th 114.FOURC>will mov
Page 23 and 24: 8 0.98 0 0 17603 38839 19 0.99 0 0
Page 25 and 26: 4.FOURC> p date(1e9)Sat Sep 8 21:46
Page 27 and 28: Controlling Output Tothe Printer an
Page 29 and 30: By convention, global variables in
Page 31 and 32: 16.FOURC> for (i = 0; i < MOTORS; i
Page 33 and 34: When a macro definition contains ar
Page 35 and 36: 38.FOURC> undef com39.FOURC> prdef
Page 37 and 38: 43.FOURC> lsdef *scanEscan (1448) a
Page 39 and 40: diffractometer. For example, they m
Page 41 and 42: set_lim(motor_number, low, high) an
Page 43 and 44: 66.FOURC> getcounts; printf("%s = %
Page 45 and 46: the number of bytes is less than n
Page 47 and 48: PLOT-> fnscans.4 options scan-numbe
Page 49 and 50: #S number Starts a new scan. number
Page 51 and 52: ShowscansThe showscans program is a
Page 53 and 54: REFERENCE MANUAL
Page 55 and 56: IntroductionThe material contained
Page 57 and 58: ArraysArrays are formed using squar
Page 59 and 60: Numer ic ConstantsNumeric constants
Page 61 and 62: !! Redo the previous command.!14 Re
Page 63 and 64: In some installations, spec is inst
Page 65 and 66: ExitingA spec session is normally t
Page 67 and 68: DEBUG — is a user-assignable nume
Page 69 and 70:
USER — is string valued and is se
Page 71 and 72:
The concatenation operator comes in
Page 73 and 74:
The second form of the for statemen
Page 75 and 76:
These are the grammar rules:express
Page 77 and 78:
local identifier-list [ ; ]syms pat
Page 79 and 80:
Utility Functions and CommandsAll f
Page 81 and 82:
.sp N — spaces N lines. Without a
Page 83 and 84:
¢The formatting commands:.RB .BR .
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"ischr" or "−c" — Returns true
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polled devices, spec needs to perfo
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"show_prdef_files" — When this mo
Page 91 and 92:
EOS sequence are read or until the
Page 93 and 94:
¡with dlog or ends with .dlog . De
Page 95 and 96:
10.FOURC> def change_it ’{11.quot
Page 97 and 98:
tty_cntl(cmd) — Sends terminal-sp
Page 99 and 100:
Commands For Var ia blesglobal name
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¤£ ¢prdef pattern ... — As abo
Page 103 and 104:
at the end of the line.Within a mac
Page 105 and 106:
config file. Built-in code for the
Page 107 and 108:
RS-232 Serial InterfacesSerial func
Page 109 and 110:
vme_put32(addr, data [, dmode ])
Page 111 and 112:
In addition, device-dependent value
Page 113 and 114:
correction. If val is given, then t
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¡and is set in the config file. Th
Page 117 and 118:
¡data_grp(grp, npts, wid) — Conf
Page 119 and 120:
"min" — Returns the minimum value
Page 121 and 122:
"xlog" — Use a logarithmic x axis
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continued line, appropriate for sav
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LIBS= parameters. If the tools prov
Page 127 and 128:
¡void set_return_data(double *x, i
Page 129 and 130:
split(string, array) — Splits the
Page 131 and 132:
STANDARD MACRO GUIDE
Page 133 and 134:
IntroductionThe standard macros inc
Page 135 and 136:
the argument is not a valid mnemoni
Page 137 and 138:
Utility MacrosUNIX CommandsThese si
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# View (and modify), then reread co
Page 141 and 142:
if ("$1" != ".") {DOFILE = "$1"if (
Page 143 and 144:
Star t-up MacrosThese macros ask fo
Page 145 and 146:
Motor Macrosmv motor posmvr motor p
Page 147 and 148:
Change a motor limitdef set_lm ’i
Page 149 and 150:
# Where - all motorsdef wa ’waitm
Page 151 and 152:
# "count" is the basic macro to cou
Page 153 and 154:
Reciprocal Space MacrosThe followin
Page 155 and 156:
Scan MacrosThe following sections s
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Basic Reciprocal Space Scanshscan s
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def Pheader ’printf("\n Setpoint
Page 161 and 162:
’}Here are examples of _settemp m
Page 163 and 164:
Pr inter Initializa tion MacrosThes
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’X_L = motor_name(_m1)_sx = _s1 ;
Page 167 and 168:
space scans, the limit check must l
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}}Pheaderprintf("\noffpprintf(" ")_
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# The loop macro, called by all the
Page 173 and 174:
FOUR-CIRCLE REFERENCE
Page 175 and 176:
IntroductionWhen invoked by the nam
Page 177 and 178:
Once properly configured, diffracto
Page 179 and 180:
Four-CircleModesAs noted above, bec
Page 181 and 182:
asurface, keeping α small will kee
Page 183 and 184:
¢¢¢¢Sector sSectors correspond
Page 185 and 186:
Four-CircleFilesMost questions rega
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U[14] g_l0 or0, setor0 L of primary
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’gpset A[mA[1]] g_u01gpset A[mA[2
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global REFLEX # Variable for file n
Page 193 and 194:
To calculate the new lattice parame
Page 195 and 196:
ADMINISTRATOR’S GUIDE
Page 197 and 198:
IntroductionThe first section of th
Page 199 and 200:
The distribution will be in tar for
Page 201 and 202:
¢KSC 3929 SCSI-CAMAC file location
Page 203 and 204:
Installing Driver sIn the early his
Page 205 and 206:
Fine Tuning the HardwareConfigurati
Page 207 and 208:
...*gparam[3] = 1.54;...if (*gparam
Page 209 and 210:
Makefile, and /usr/local/lib/spec.d
Page 211 and 212:
Ena bling E/ISA I/O Por ts On HP 70
Page 213 and 214:
ˆW Gain wizard access to set prote
Page 215 and 216:
CA_LC2301CA_LC3512CA_LC3521CA_LC358
Page 217 and 218:
MCU_O As above, but with old PROMsM
Page 219 and 220:
config file that has the most motor
Page 221 and 222:
the edconf program set-user id spec
Page 223 and 224:
HARDWARE REFERENCE
Page 225 and 226:
Introductionspec includes built-in
Page 227 and 228:
DSP 6001/6002 CAMAC With No Driverc
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Kinetic Systems CAMAC Softwareconfi
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Any of the National Instruments boa
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National Instruments SB-GPIB Ver 1.
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modified version of the standard li
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Bit 3 Model 616/617 PCI-VMEBit 3 Mo
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Motor Controller sAdvanced Control
Page 241 and 242:
panel controls. Youshould consult t
Page 243 and 244:
Huber SMC 9000 (GPIB)config file:GP
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motors on the board) and clears the
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translation stages, the maximum val
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MOTORS DEVICE ADDR MODE NUM TYPEYES
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The driver is contained in the file
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30.FOURC> print motor_par(tth, "rea
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free-axis-displacement commands "L+
Page 257 and 258:
PMC Corporation DCX-100 (Serial and
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Motor ParametersThe steps per deg/m
Page 261 and 262:
Timer s and CountersAm9513-based Co
Page 263 and 264:
DSP RTC-018 Real Time Clock (CAMAC)
Page 265 and 266:
Kinetic Systems 3610 6-Channel 50 M
Page 267 and 268:
Or tec 974/994/995/997 NIM Timer s
Page 269 and 270:
Setting Operational ParametersThe c
Page 271 and 272:
mca_par("first_ch") — returns the
Page 273 and 274:
Oxford/Tennelec/Nucleus PCA Mutlipo
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mca_par("preset") — in PHA mode,
Page 277 and 278:
¢REFERENCESJournal articles descri
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camac program, 199cat macro, 127cd
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opening, 6selecting, 6standard form
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saving to output device, 132scan, 1
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number,35, 37output, customizing, 1
Page 287 and 288:
wait() function, 33, 68, 77, 78, 99
Page 289 and 290:
¡spec (1) (CSS Utilities) spec (1)
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