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

Reverse Power This instrument provides protection from signals inadvertently applied
Protection Status to the RF output of the instrument. This protection is commonly
called reverse power protection (RPP). The instrument automatically
detects the reverse power, which in-turn disconnects the instrument’s
RF output. When the RPP engages, the front panel display will read
RF OFF but must be queried for HP-IB reporting.
2-16 HP-IB Programming
Example: Check the condition of the RPP
18 l:llJTF’lJT 71’3; “!3THT: QlJE!s: PI:ILJ: C:l:lt~@‘?”
2 ~3 E t.4 T E F: 7 1 r 3 r.
‘8).3llJe
:38 FT:pp=E: 1 t.jfjtjD ($‘.a 1 ue 7 1 :r
48 1 F Rpp= 1 THEI. PR 1 t.jT ” RPP i 5 erlg.sged”
58 1 F R:pp= 1 THEI. 1 t;IPlJT ” 15 yet.>et-se pt:~~.,.~et- i riptAt.
c,~,t-t-e,_t,e,j(‘.~/t.I::l ” ) A$
Es0 IF i=+$=“‘,“‘THEt,j OlJTPlJT71’3 j “I:IIJ-/-P: !sTflT 1:tt.i”
78 EtW
Line 10
Line 20
Line 30
Line 40
Line 50
Queries the condition of the POWer register.
Enters the condition of the POWer register into the
variable “Value”.
Uses the HP BASIC command, BINAND to check the
contents of bit 0 in “Value”. If bit 0 is a “l”, “Rpp”
will equal “ 1”.
Checks if the RPP condition is “ 1” and if true prints
that the RPP is engaged.
Checks if RPP condition is “ 1” and if true asks if the
situation has been corrected.
Line 60 Checks if the answer was yes to correction and if true
turns the RF output on to reset the RPP