Marti Electronics SRPT-30, User Manual

Page: 34 / 129

8/7/2003
28
Changing Output Frequency via Channel Select – SRPT-40A
Only
The frequency can also be changed by entering a channel number that was previously stored with a frequency. See
Storing Output Frequencies into Channels for instructions on how to store frequencies. There are ten channels
available for storing and recalling frequencies. These ten channels are preset with default or customer requested
frequencies at the factory.
To change frequency via channel select, the S1 dip-switches behind the front panel must be set with switches 1 and
2 in the “ON” position and 3 and 4 in the “OFF” position. These are the default positions and are in the same position as
when changing the frequency direct. So there’s no need to remove the top cover.
Now you’re ready to enter the channel. This is done by setting the six left-most digits (digits 2-7) of the
FREQUENCY SELECT pushwheel switches equal to zero. Then the far right digit (digit 1) is set to the channel of
choice (channel 0 – channel 9). After entering the channel, press the EXECUTE pushbutton down and then release. The
SYNTHESIZER will change to the frequency that was stored in the channel.
WARNING
THE REMAINING OPERATIONS ARE FEATURES THAT REQUIRE SETTING INTERNAL DIP-
SWITCHES.
IN ALL CASES, WHEN PERFORMING THESE OPERATIONS, THE SRPT-40A MUST BE ON AND
THE TOP COVER MUST BE REMOVED.
WHEN THE OPERATION IS COMPLETE, ALWAYS SET THE INTERNAL S1 DIP-SWITCHES WITH
SWITCHES 1 AND 2 “ON” AND SWITCHES 3 AND 4 “OFF”. THEN RE-INSTALL THE TOP COVER.
Storing Output Frequencies into Channels – SRPT-40A Only
The SRPT-40A must be locked on a frequency before storing that frequency into one of the ten available channels.
It is not necessary, however, that the SRPT-40A be transmitting, hence the TRANSMIT/STANDBY switch can be in
STANDBY.
First, lock on to the desired frequency either directly or via channel select. Remove the top cover of the SRPT-40A.
Set the S1 dip-switches (located behind the front panel) as follows: Switches 1, 3, and 4 set to the “OFF” position and
switch 2 set to the “ON” position.
Next, set the six left-most digits (digits 2-7) of the FREQUENCY SELECT pushwheel switches equal to zero. Then
the far right digit (digit 1) is set to the channel of choice (channel 0 – channel 9) to be stored. After entering the channel,
press the EXECUTE pushbutton down and then release. The current frequency-in-lock will be stored in the selected
channel and the SRPT-40A will remain at its current frequency. If you need to store more channels, repeat the steps in
this paragraph.
Finally, put the S1 dip-switches back to where they were, i.e., switches 1 and 2 in the “ON” position and switches 3
and 4 in the “OFF” position. Re-install the top cover.