5-5
COMMAND
DESCRIPTION VALID RANGE
Fnn.nnnnn FREQUENCY
Allows setting operating Frequency with a resolution of 1 Hz from
0-30 MHz. Least significant digits may be dropped (assumed 0). A
decimal point is required except when frequency is 0 Hz (it is not
necessary to have any frequency data in the command string for 0
Hz). Display frequency is the suppressed-carrier frequency in
sideband modes and passband center in all other modes.
Example: ‘F14.123456’ (set frequency to 14.123456 MHz)
‘F14.1’ (set frequency to 14.100000 MHz)
‘F’<CR> (set frequency to 0 Hz)
0 – 30 MHz
Hnnn SET RS-232 DELAY
Controls the time between tx-output enable and the occurrence of
the first transmitted bit on the RS-232 transmit line. This command
may be used to overcome an RS-232 controller with a slow
response. Units are in milliseconds.
Example: ‘H40’ (Set delay to 40 milliseconds)
0 – 255 ms
Inn.nn IF FILTER
This command selects the IF-filter Bandwidth. Bandwidth range is
100 Hz to l6 kHz in all detection modes except ISB (600 Hz is FM,
SAM, ISB narrow filter limit, 4 kHz is SAM narrow filter limit).
BW is fixed at 3.2 kHz in ISB mode. If operator requests an
unavailable filter, the receiver will select the closest wider filter to
the request. Units are in kHz. Appending a ‘C’ to the ‘I’ command
will access a Fast Filter for bandwidths below 4kHz. An ‘F’ is
displayed in front of the filter selected on the front panel when Fast
Filters are used. Fast Filters exhibit reduced delay times with
degraded shape factors. Fast Filters should only be used in systems
sensitive to filter delay.
Example: ‘13.2’ (Set IF Bandwidth to 3.2 kHz)
‘10.5’ (Set IF Bandwidth to 500 Hz)
.1 – 16 kHz
(FM .6 – 16kHz)
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