You will hear little, if anything on those frequencies. The 4 counties around
Portland all use Motorola trunking systems. The Pro-164 needs only the four
control channels for each system to hear the entire system. Use one bank
for each system. Find the Talk Group IDs in the database.
First bank will be for the PORTLAND system.
(Each bank has 5 sub-banks, each holding 30 Talk Group IDs.).
The first step is to enter the control channel freqs.
1. Press PGM -> TRUNK -> FUNC, then use the arrows to select a bank.
2. Press MODE, select MOT.
3. Press PGM, select channel number. (use arrows to change channels).
4. Enter the first freq. 858.7125 -> ENT
5. Press MODE until MOT appears -> ENT (MOT will apply to next 3 freqs.).
6. Enter next freq. 858.7375 -> ENT.
7. Enter next freq. 859.2625 -> ENT.
8. Enter the last freq. 859.4625 -> ENT.
9. Press SCAN.
Now it will start "trunking".
There are two trunking modes, OPEN and CLOSED.
In OPEN mode you will hear ALL active Talk Groups.
In CLOSED mode you will hear only the TGs you enter into the sub-banks.
To program the sub-banks.
1. MAN -> PGM -> TRUNK.
2. FUNC - arrow to select bank.
3. Press MODE to select MOT.
4. Press TRUNK to select sub-bank.
5. Enter a Talk Group ID (2 to 5 numbers) -> ENT.
6. Enter then next ID -> ENT.
7. When all IDs have been entered, press SCAN.
Just do the same steps for the other 3 counties.
Clackamas County
852.4375
852.8625
853.2625
853.7625
Washington County
859.2375
859.7375
860.2375
860.7375
Clark County
859.7625
859.9375
860.7625
860.9375
