Rohde & Schwarz 890 Series - Inquiry of PZG Line Status; Passband Tuning

V L F > H F R E C E I V E R S f R & S E K 8 9 5 / R & S E K 8 9 6
User Manual f Special Functions
A3.7.1 Passband Tuning
Command syntax:
Code: PB
Parameter: .................... a
Possible entries / replies
DEF=0 (see A3.7.25)
Range: ........................ >5000 to 5000
Stepwidth: .................. 10 Hz
Entry: .......................... in Hz
DEF=1 (see A3.7.25)
Range: ........................ ± bandwidth / 2
Stepwidth: .................. 10 Hz
Entry: .......................... in Hz
Note:
The frequency offset function should only be
used in modulation modes AM, CW, SSB, F7B,
FAX and FM. Units which may have been en>
tered are automatically rounded off.
DEF=1 (see A3.7.25): The maximum (+band>
width/2 and minimum (>bandwidth/2) values
depend on the currently effective IF band>
width. If necessary, inquire currently effective
bandwidth via command W? (see A3.3.4) or Q
(see A3.3.5).
Example 1:
Shifting the passband curve of the currently ac>
tive IF filter by >100 Hz as regards the receive
frequency.
Command = rAxxPB>100?
Example 2:
Inquiry of the currently effective shift
Command = rAxxPB??
Æ Reply = rAxxPB>100?
A shift of >100 Hz is effective.
A3.7.2 Inquiry of PZG Line Status
Command syntax:
Code: P
Possible replies
Parameter: .................... a
0 = receive level < level and / or syllabic
threshold or level line inhibited
1 = receive level f level and / or syllabic
threshold
The PZG line status is P0, if the level and syllabic
control was inhibited via command PL0 and
PS0 (see A3.7.3 and .5).
Via command PL1 and / or PS1 (see A3.7.3 and
/ or .5) the level and / or syllabic control is en>
abled, that is, the PZG line status depends on
the current receive level and the programmed
thresholds (see A3.7.4 and / or A3.7.6).
P0 = receive level < level and / or syllabic
threshold Æ transistor is blocked
P1 = receive level f level and / or syllabic
threshold Æ transistor is conductive
An inquiry of the PZG line status switches the
PZG line to OFF. The line is switched to ON as
soon as the PZG line status changes from P0 to
P1.
Thus several VLF>HF receivers can be connected
via the PZG line to an interrupt input of the
CPU.
Note:
Inquiry of the status is not permitted if the PZG
line status is used as the switching criterion.
Example:
Inquiry of the PZG line status
Command = rAxxP??
Æ Reply = rAxxP1?
The receive level is higher than the pro>
grammed threshold.
6164.0717.02_01
> A3.25 >