General Dynamics URC-200 (V2) User Manual

General Dynamics C4 Systems URC-200 (V2)
71
In a similar fashion, line 4 of the chart shows that the next available frequency is 118.0166 MHz.
This also is only allowed to have a channel spacing of 8.33 kHz. To operate at this setting, enter
118015 to the transceiver.
Lines 5 and 6 of the chart show that the process repeats at this point.
If the user attempts to enter a frequency that is not allowed, the transceiver will simply not accept
the input until a valid value is entered.
Table 18 - Aviation Mode Frequency Chart
Line
Number
Channel
Entered
(MHz)
Actual
Operating
Frequency
(MHz)
Channel
bandwidth
(KHz)
1
118.000
118.0000
25
2
118.005
118.0000
8.33
3
118.010
118.0083
8.33
4
118.015
118.0166
8.33
5
118.025
118.0250
25
6
118.030
118.0250
8.33
7
118.035
118.0333
8.33
8
118.040
118.0416
8.33
9
118.050
118.0500
25
10
118.055
118.0500
8.33
11
118.060
118.0583
8.33
12
118.065
118.0666
8.33
13
118.075
118.0750
25
14
118.080
118.0750
8.33
15
118.085
118.0833
8.33
16
118.090
118.0916
8.33
17
118.100
118.1000
25
18
118.105
118.1000
8.33
19
etc.
etc.
etc.
4.7.3.3 Tuning Increment vs. Channel Spacing, Electrical Characteristics
The “tuning increment” is the minimum incremental change in operating frequency by which a
transceiver is capable of tuning.
The “channel spacing” is the window (or the bandwidth in kHz) in which a tuned transceiver
operates, and represents the minimum acceptable adjacent channel separation. This window, or
bandwidth, is determined by the receiver’s adjacent channel rejection (selectivity or bandwidth)
and the transmitter’s adjacent channel power. Please refer to Table 1 for typical URC-200
performance parameters for both 25kHz and 8.33kHz channel spacings.
In the URC-200 (V2) without the ECS-8 option installed, the channel spacing (IF selectivity) is
fixed at 25kHz, regardless of whether the tuning increment is 5kHz, 12.5kHz or 25kHz.

General Dynamics URC-200 (V2) Specifications

General

Brand	General Dynamics
Model	URC-200 (V2)
Category	Transceiver
Language	English