Tait TM8235, Service Manual

Page: 121 / 578

TM8100/TM8200 Service Manual General Information 121
© Tait Electronics Limited June 2006
Table 4.5 CCTM commands in the frequency-synthesizer and receiver categories
Command
Usage
Entry at keyboard Response on screen
Frequency-synthesizer category
72 – Lock status
Reads the lock status of the RF PLL,
FCL and LO2 respectively
72 x y z
where
x
is the RF PLL,
y
the FCL,
and z the LO2 lock status
(0=not in lock, 1=in lock)
101 – Radio frequencies
Sets the transmit and receive
frequencies to specified values
101 x y 0
where
x
is the transmit and
y
the
receive frequency in hertz
(any integer from 50 000 000 to
1000 000 000)
None
301 – Calibrate VCXO
Calibrates the VCXO of the FCL
301 0 10
Four KVCXO control sensitivity
values, followed by message with
results of calibration attempt
302 – Calibrate VCO(s)
Calibrates the VCO(s) of the
frequency synthesizer
302 0 10 Eight KVCO control sensitivity
values, followed by message with
results of calibration attempt
334 – Synthesizer power
Switches the frequency synthesizer
on or off via the
DIG SYN EN
line
334 x
where x is the required state
(0=off, 1=on)
None
335 – Synthesizer switch
Switches the transmit-receive
switch of the frequency synthesizer
on or off via the
DIG SYN TR SW
line
335 x
where
x
is the required state
(0=off, 1=on)
None
389 – Synthesizer mode
Sets the mode of the frequency
synthesizer to fast or slow
389 x
where
x
is the required mode
(0=slow, 1=fast)
None
Receiver category
32 – Receive mode
Sets the radio in the receive mode
32 None
63 – RSSI level
Reads the averaged RSSI level
63 x
where
x
is the averaged level in
multiples of 0.1 dBm
376 – Front-end tuning
Sets or reads the tuning voltage for
the front-end circuitry of the
receiver
376
(to read voltage)
x
where x is the front-end tuning
voltage in millivolts
376 x (to set voltage)
where
x
is the front-end tuning
voltage in millivolts
(any integer from 0 to 3000)
None
378 – Receiver output level
Reads the signal power at the
output of the channel filter
(the square of the amplitude)
378 x
where
x
is the signal power