Japan Radio Co. JSS-2150, Service Manual

Page: 76 / 160

SETUP AND ADJUSTMENT
2-16
2.2.5.4 Setting the transmission conditions
Adjust the radio (mainly transmitter) as below.
z
TX power adj.
Check and adjust the Tx output. For details,
refer to the explanation later.
z DSC/NBDP (AF)
Used to measure the DSC or NBDP audio
frequency. For details, described below.
z
Calibration
Calibrate the meter and/or frequency. For
details, described below.
z
Speech-processor
Set the speech-processor to active: ON
Set the speech-processor to inactive: OFF
Remarks: This function changes the ALC
characteristics so they do not
meet the performance criteria of
the inspection standards. Turn it
on only for ships using as a SSB
radiotelephone.
Note: The speech processor is a function
that increases the average Tx power.
Normally controls peaks with ALC
and compresses the gain of small
signals. When using this function,
controls peaks with a limiter, so gain
is not affected and the average Tx
power is increased. This function is
available in TEL and H2B modes.
z RBK duration
Set the time until RBK automatically turns
off after transmission. (Default: 3 minutes)
z
TX delay
When a BK relay is installed to switch to an
external antenna as shown to the left, set to
on to delay the start of transmission.
The delay time is 70msec.
z
Model power
Set to rated output of 150 W: Normal
Set to rated output of 75 W: 75W
Note) This does not affect the TX power
adj. for bands or channels. In other
words, an adjusted value (ex.95%) at
150W is applied at 75W as it is.