The "Tone Deviation" Calibration Procedure - RF Technology Eclipse Series Operation And Maintenance Manual

Then the firmware will make the following request.
Change the signal generator frequency to 1kHz
When this has been done, the User needs to hit the Enter key, and the following will
appear again.
Enter + or - to increase or decrease the deviation,
and <RET> when the deviation is 5kHz
?
In response to the +, or – keys (or m, p, M, or P), the firmware adjusts the BALANCE
VCA accordingly. The user should do this until the deviation is as close to that
achieved at 75Hz as possible.
That now sets the balance.
The firmware will now prompt the user for a "User specified Deviation". This is a
deviation other than the following standard deviations, 5.0kHz, 4.0kHz, 3.0kHz,
2.5kHz, 2.0kHz, and 1.5kHz. At the factory, it is set to 4.5kHz.
Enter the User Specified Deviation (kHz): 4.5
In this example, the user has specified 4.5kHz deviation.
Then the software will automatically set the Hi-Gain option on, which will cause the
output to got to somewhere between 7 and 9kHz deviation, and it will be very clipped.
Then the user will be prompted, as it was for the Balance adjustment, to enter keys to
set the deviation to as close to 5kHz as possible, whilst still being lower than 5kHz.
That sets the deviation setting for U303 for 5kHz maximum deviation. This is then
followed by the same procedure to set the 4kHz maximum deviation setting, then 3kHz,
2.5khz, 1.5kHz, and then the User Specified Deviation (e.g. 4.5kHz).
The least significant BCD digit of the deviation parameter, in a channel setting, selects
the appropriate maximum deviation when the exciter keys up. (See 4.2 and Table 7). In
this way, for example, it may be possible to allocate frequencies in the band 30-40MHz
on 12.5kHz channel spacing, and on 20kHz channel spacing over the band 25-30MHz.
6.6

The "Tone Deviation" Calibration Procedure

T50> cal tone
This procedure should not normally be invoked as part of any field maintenance. The
only conceivable time that it might ever be used, would be if a non standard maximum
tone deviation was required.
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6 FIELD ALIGNMENT PROCEDURE
RF Technology T50