Hytera MD78X, Service Manual

Page: 426 / 519

Specifications and Blind Spot
VHF (136MHz
–
174MHz)
10

43 dB@20 kHz

45 dB@25 kHz
Rated Audio Power

Internal (20 Ω load): 3 W

External (8 Ω load): 7.5 W
Max. Audio Power

Internal (20 Ω load): 8 W

External (8 Ω load): 20 W
Rated Audio Distortion ≤ 3%
Audio Response +1 dB to -3 dB
Conducted Spurious
Emission
<-57 dBm
Environment
Operating Temperature -30
℃
to +60
℃
Storage Temperature -40
℃
to +85
℃
ESD
IEC 61000-4-2 (Level 4)
±8 kV (contact)
±15 kV (air)
American Military Standard MIL-STD-810 C/D/E/F/G
Dust & Water Protection IP54
Humidity Per MIL
-
STD
-
810 C/D/E/F/G Standards
Shock and Vibration Per MIL
-
STD
-
810 C/D/E/F/G Standards
GPS (for MD78XG only)
Accuracy specs are for long-term tracking (95th percentile values>5 satellites visible at a nominal
-130dBm signal strength).
TTFF (Time To First Fix) Cold
Start
< 60s