Here is what I've gathered on the Nevada Test Site trunk system. When
it doesn't match radioreference,

http://www.radioreference.com/modules.php?name=TRSDB&sid=3265

then you have something to investigate. ;-) This is only for the
systems heard in the ranges. I never checked out the system at the NTS
facility in North Las Vegas. I've monitored Nellis AFB using 407.25 as
the CC. I don't list the Nellis system because it acts peculiarly in
M-trunker. However, it does seem to use the same parameters as the rest
of the system. I'm only showing one control channel for each system
because that is all I ever heard. [This doesn't mean what is found in
radioreference is wrong, but rather I never heard those alternate
control channels used.]

The system has a split. This requires an extended table for a Pro-96. I
don't know how Uniden handles this. Based on my monitoring, the split
could be anywhere from 707 to 712. I'm using 710 because someone
submitted that to radioreference.  If you are not familiar with split
systems, basically past a certain hex code, the equation to compute the
frequency changes. If you don't program the split, the scanner switches
to the wrong frequency and you hear nothing. By logging where this
occurs and noting this for multiple systems, you can narrow down where
the split occurs.

While I'm boring you, the equation to predict the frequency is:
frequency = (decimal code - offset)*spacing + base

The first offset is always 380, which I assume is a Motorola designated
parameter. Looking at the data, the spacing for the first set is likely
to be 12.5Khz. You can solve the equation for the base and then see if
it matches the data you gathered.  The second set of parameters is
similar, though you have to find that location where the first set of
parameters doesn't work, i.e. the split.

My system numbers are whatever m-trunker indicates. This is one way of
being consistent. Since I don't know what software the other submitters
to radioreference.com are using, I can't vouch for how they determined
the system numbers.

I'll have to dig up my log book to indicate where I heard each system.
That info in not in my database.

Note that if you want to monitor the June 2nd explosion, I have two
suggestions. First, you should get out of Vegas. It is possible the
talk groups will be relayed to the North Las Vegas facility, but that
is only if a person associated with the test happens to have a radio
logged on to the system in North Las Vegas. I'd suggest driving to the
ranges. Without a lot of effort, you could drive to Cold Spring, the
town behind the prisons on route 95. You could also drive to Mercury,
but you would have some altitude at Cold Spring. Second, you should try
to monitor the system at least the day before the big bang. It is been
my experience that they conduct dry runs of these tests with a very
cool count down. My guess is the explosion will take place in Area 4,
but I'm going to try to get better information.

base    406.1000 410.5000
spacing    0.0125     0.0250
offset    380.0000 710.0000


Sys c1
hex    Dec
17d    381    406.1125 control
1c2    450    406.9750
1e0    480    407.3500
1f7    503    407.6375
223    547    408.1875
243    579    408.5875
27e    638    409.3250

Sys c2
hex    dec
183    387    406.1875 control
1b3    435    406.7875
1c3    451    406.9875
1d3    467    407.1875
233    563    408.3875
27c    636    409.3000

Sys c3
hex    dec
1be    446    406.9250 control
1ca    458    407.0750
1f3    499    407.5875
205    517    407.8125
21b    539    408.0875
26e    622    409.1250
293    659    409.5875

Sys c4
hex    dec
17d    381    406.1125 control
194    404    406.4000
1c2    450    406.9750
1e0    480    407.3500
223    547    408.1875
26e    622    409.1250
2a2    674    409.7750

sys c5
hex    dec
1a6    422    406.6250 control
20b    523    407.8875
21c    540    408.1000
250    592    408.7500
29b    667    409.6875
2c2    706    410.1750

sys c6
hex    dec
210    528    407.9500 control
222    546    408.1750
2be    702    410.1250
2c8    712        410.5500
2f2    754        411.6000

sys c7
hex    dec
180    384    406.1500 control
203    515    407.7875
260    608    408.9500
2a3    675    409.7875


sys c8
hex    dec
17f    383    406.1375 control
194    404    406.4000
24c    588    408.7000
2a2    674    409.7750   
2cc    716        410.6500