Audio Interface
Number of ports: 8 per card. Max of 4 RIBs per
MIU Type: Balanced audio on RJ45
Audio Input
Input impedance: > 10kΩ
Nominal input level: 0dBu
Input level adjustment: Via software from -10.5dB to +12dB with additional +20dB boost feature
Frequency response: 20Hz to 20kHz (16kHz sampling)
Distortion: <0.05% when routed locally
Noise: < -60dB un-weighted
Audio delay: Independent software adj. on each channel. 0-2000ms in 20ms steps.
Filters: Audio inputs have selectable filters giving 3, 6 or 9dB cut/boost at 3kHz.
Audio Output
Type: Electronically balanced on RJ45 connector
Output impedance: <60Ω
Output level adjustment: Via software from -34.5dB to +12dB in steps of 1.5dB.
Mute option Frequency response: 20Hz to 20kHz (16kHz sampling)
Distortion: <0.05% when routed locally
Noise: < -60dB un-weighted
COR (GPI input from radio)
Type: Grounding contact - external equipment must provide ground closure.
Polarity: Software selectable Input voltage range “on”: -2V to +2V (nominal) with respect to MIU 0V
Input voltage range “limits”: >-50V, <+60V
Attack (de-bounce) time: Adjustable 0-1999ms in 1ms steps
PTT (GPO output to radio)
Type: Solid state relay - RIB provides ground closure
Polarity: Software selectable
Absolute maximum voltage: +60V peak (AC or DC)
Max Current: 500mA
Hold time: 0-5000ms in 1ms steps
VOX
General: All audio inputs can use PTT or VOX triggering, software selectable
Attack: time Software adjustable 10-5000ms in 1ms steps
Release time: Software adjustable 750- 5000ms in 1ms steps
Threshold: Software adjustable -10 to 50dBu
RJ45 Connector Pinout
Pin 1: COR (GPI)
Input Pin 2: COR/PTT Ground
Pin 3: PTT (GPO)
Output Pin 4: Audio In- (May be grounded if unbalanced audio is used)
Pin 5: Audio In + Pin 6: Audio Ground Pin 7: Audio Out + Pin 8: Audio Out- (Must be grounded if unbalanced audio is used)
Environmental
Operating Temperature: 32 to 122°F (0 to 50°C)
Storage Temperature: -4 to 185°F (-20 to 85°C)
Operating Humidity: 0 to 90%, non-condensing, relative humidity
Dimensions
5.5 x 0.67 x 8.1in (WxHxD)
(140 x 17 x 212mm)
Weight
7.1 oz (200 g)
Reliability
MTFB: 121,000 hours