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NOTE
Status responses differ from status commands. Refer to
next paragraph.
Status Response. The status data is sent as the last item in each monitor response
("G" or "T') from the Receiver. The status data is returned to the remote-control device
iri the format SN, where N
is
a one or two digit number-representing the following
conditions:
o
Receiver is -operating in local control operating condition.
1 Receiver is operating in remote control operating condition.
2 Synthesizer is out" of lock.
4 Receiver is in the override mode (discussed under Functions Unique to the Remote
Control Operating Condition).
8 Last command sequence had character transmission error.
16 Last command sequence had data error.
32 Lost data error in last sequence.
If two or more conditions are present, the numbers representing the conditions will be added
together and transmitted as one number. For example, 17
(1
+
16) would indicate that the
Receiver is in remote control and last command sequence had a data error; 13 ( 8
+
4
+
1)
would indicate remote control, override mode and character transmission error. Note that
some numbers are not valid, i.e. 12 since override mode is impossible while in LOCAL
control.
-
The next status response to be considered is
"TX"
where
X
is the desired parameter(s) which
triggers a data stream in the following format:
XVS
where:
X is the identity letter of the parameter (F, D, M, I, B, or A)
V
is the value of the parameter
S
is the status response
,EXAMPLE 10:
Tne command S99TFDCR might obtain a response such as: .F2.35D3S1 where:
Frequency:
Detector Mode:
02.350000 MHz
CW with variable BFO
Status:
Receiver is in the remote operating condition
f.
Functions Unique to the Remote Operating Condition
Override Mode. The remote control device may be used to command a Receiver to switch
to the override mode. In override mode. some of the automatic operating features of the
Receiver are disabled. This is. the first local oscillator is always tuned to 40.455 MHz above
the entered RF frequency and the IF slot is selected remotely regardless of the type of filter
installed. Therefore. the remote controller must decide what the fIlter should be used for.
the type of detection mode to employ, and the BFO offset to receive a signal. For instance,
in sideband detection with a symmetrical filter, the first local oscillator and BFOmust be
properly offset to correctly demodulate the signal. The remote controller also assumes the
3-28
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