If the P25 system mentioned by michael7676 is the one you are talking about, then the following it what you need to do:
The following is taken from the 296D Manual:
Programming Type2/Digital VHF and UHF Systems
To program a Type 2/Digital VHF or UHF system, you need to
know the frequencies the system uses and also the Base,
Space, and Offset settings.
These settings are normally provided along with the system frequencies.
1. Select the trunk programming mode.
2:SCAN OPTION → 2:TRUNK
2. Use the scroll bar to select the bank you want to program,
then press E.
1:TRUNK TYPE → 1:ON
3. Select one of the following trunk types for Motorola Type 2 or digital Systems:
4:TYPE2/P25 UHF
Motorola Type 2 or Digital systems in the UHF (450 –
512 MHz) band
5:TYPE2/P25 VHF
Motorola Type 2 or Digital systems in the VHF (148 –
406 MHz) band
4. Set the Base, Space and Offset settings.
Note: Your BC296D allows you to enter up to three Base,
Space, Offset configurations. However, most
systems only use one configuration.
a. Use the scroll bar to select the configuration to
program, then press E.
BASE CONFIG 1
b. Enter the system’s base frequency, then press E.
c. Enter the system’s space frequency, then press E.
d. Enter the system’s channel offset, then press E.
Repeat a-d or press MENU/BACK three times to continue
programming the system.
5. Select the channel to store the information into.
2:TRUNK CHANNEL
Use the scroll bar to select a channel within the bank to
store a system frequency, then press E.
6. Store the channel information
1:FREQUENCY
Enter the frequency for the channel, then enter an Alpha
Tag for the channel.
Repeat Steps 5 and 6 to store the rest of the frequencies for
the system.
Then you have to do this:
Setting APCO 25 Sound Quality
Each APCO 25 system has slightly different system settings
that control how the audio is digitized. To get the best sound
quality, you need to match as closely as possible the system’s
settings.
To adjust the sound quality:
1. While monitoring a specific APCO P-25 talkgroup, press
the HOLD/MAN key.
2. Press and hold the 9 key. On Line 1 of the screen you will
see
SOUND QULTY: 0050 (for example). This shows
the Sound Quality. The lower the level the better the
Sound Quality.
3. To manually set the sound quality, rotate the scroll bar up
or down. As the threshold adjusts in increments of 100 at
the bottom of the screen watch the Sound Quality level
increase or decrease and continue to rotate the scroll bar
until you have achieved the best Sound Quality level.
Notes: • When APCO P-25 signal is not received,
SOUND QULTY: **** appears on the display.
• You must be receiving an APCO P-25 signal to
make this adjustment
A chart showing the Threshold Adjustment Range is listed
below.
(This is part of the chart you need, done the best I could to get it to line up.)
___________Lower__________Mid___________Upper
Band____Min Default Max___Default______Min Default Max
VHF____330 930 2130______2147________2264 3464 4064
4. Once you have adjusted the Sound Quality to the best
possible level, press E.
Press RSM to exit the Sound Quality Adjustment Mode.
Notes: • To cancel the adjusted threshold level, press the period
key.
• The adjusted threshold level for the current
frequency can be set back to the default value by
pressing and holding the Period key.
• When you change the Sound Quality it affects all
other APCO 25 signals in that same band. (UHF,
VHF, or 800MHz).
I hope this helped you out.
If you need more help with programming the system, you can go to the Uniden forum on the board, someone might be able to give you more help