VHF Narrowband Digital |
(Pre Jan 2006) |
(Post Jan 2006) |
|
Base / Mobile / Portable |
Base / Mobile / Portable |
Freq Stability |
2.5 PPM |
1.5 PPM / 2.5 PPM / 2.5 PPM |
TX Unwanted Emissions |
50+10LOG(pZ) or 70 dB whichever is less |
50+10LOG(pZ) or 70 dB whichever is less |
RX Adjacent Chan Selectivity |
60 dB / 60 dB / 50 dB |
60 dB |
RX Intermod Rejection |
70 dB / 70 dB / 50 dB |
80 dB / 75 dB / 70 dB |
RX Spurious Rejection |
70 dB / 70 dB / 60 dB |
90 dB / 80 dB / 70 dB |
RX Conducted Spurious Emissions |
-57 dBm |
-57 dBm |
Testing Procedure Used |
TIA / EIA 603 & TSB 102.CAA |
TIA / EIA 603-B & TSB 102.CAAA-A or later |
Note: Radios acquired or placed in service prior to Jan 2006 may continue to be used until the end of their life cycle. (Ref: 47 CFR 300 5.3.5.2, Effective Dates) |