Antenna In; Base Freq (User Defined) - HP 8920A User Manual

Antenna In

Base Freq (User Defined)

This field is used to indicate losses or gains between the ANT IN port and the
device-under-test.
Enter a positive value to indicate a gain (such as an amplifier). The Spectrum
1
Analyzer's marker level (
amount. The Spectrum Analyzer's
same amount, so the trace position does not appear to change.
Enter a negative value to indicate a loss (such as cable loss). The Spectrum
Analyzer Marker's Level (
amount. The Spectrum Analyzer's
same amount, so the trace position does not appear to change.
This field is only used when the
See Also
RF Level Offset field description, on page 265
The Base Frequency field sets the RF Generator reference for channel 0 (zero)
when the
RF Chan Std
set to .
Chan
Channel frequencies are calculated using the following formula:
Channel N = Base Frequency + (N)(Channel Spacing)
The Base Frequency is calculated using the following formula:
Base Frequency = Channel 1 Frequency - Channel Spacing
For example, if your multi-channel radio's lowest receive channel frequency is
870.030 MHz and the system channel spacing is 30 KHz, you would enter
in this field. You would also use the
MHz
to tell the Test Set where other transmit and receive channel frequencies are in
relation to the base frequency, and whether or not the system is duplex.
Operating Considerations
The value of this field is only used if the
field is set to
RF Chan Std
1. Spectrum Analyzer is optional on some Test Set models.
) measurement is automatically reduced by that
Lvl
Ref Level
) measurement is automatically increased by that
Lvl
Ref Level
RF Level Offset
field is set to
USER-DEF
Chan Space
RF Display
.
USER-DEF
Chapter 7, Configure Screen
Field Descriptions
is automatically decreased by the
is automatically increased by the
field is set to .
On
, and the
RF Display
and
(Gen)-(Anl)
field is set to
Chan
field is
870
fields
, and the
255