HP 8648 A/B/C/D - Changpuak.ch

Pager Encoding Status
(Option 1EP Only)
Note
2-18 HP-IB Programming
Paging encoding status may be queried to detect the end of encoding,
or the start of each frame (for FLEX/FLEX-TD) or batch (for
POCSAG). Figure 2-2shows the example of the outputs of these bits
for the following settings.
Format FLEX
Output Mode Burst
No. of Bursts 4
Start Frame 0
Collapse Cycle 0
Header On
Terminator On
Paging Status Register
Bit 0 :
Start of frame/batch
Bit 1 :
End of encoding
Number hes- hes- he6- (ma- (wn-
(idle) sage) sage) sage) sege) chnals)
Figure 2-2. F’aging Encoding Status
If the pager format is POCSAG and the message extends over two
batches, the start of each frame/batch bit is set at every two batches.
Example: Check the end of message encoding
18 l:llJTF’lJT 7 1’3 j “:s-fH-/-: QIJE!;: PAI;: Ef.jAE: 2”
20 [llJ-&‘lJT 719; “!sTHT: QIJES: Et$=jB 4@E,”
38 l:llJTF’lJT 71’33 “s!sRE :3”
48 I F :~F’IIILL(~~‘~> THEI. F’FF:It.IT “Er~codir~g ~:orqplet.e. ‘I
58 l:llJTPlJT 719; “aC:L!z”
E,o Et.jlJ
Line 10 Enables bit 1 (decimal equivalent 2) in the PAGing
register. Enabling this bit masks other bits in the
PAGing register from reporting their status in the
summary bit to QUEStionable.
Line 20 Enables bit 12 (decimal equivalent 4096) in the
QUEStionable register. Enabling this bit masks other
bits in the QUEStionable register from reporting their
status in the summary bit to STATUS.
Line 30 Enables bit 3 (decimal equivalent 8) of the STATUS
register. Enabling this bit masks other bits from
reporting.
Line 40 Uses the HP BASIC command, SPOLL, (Serial Poll)
to see if the service request bit is reporting any
interrupts.