ZA-725 User Manual
28
ZA-725 User Manual
27
TROUBLESHOOTING
SPECIFICATION
Problem
No power.
Battery power dies shortly
after charging.
Cannot talk to or hear
other members in your
group.
Other voices (besides
group members) are
present on the channels.
The transceiver
continuously rings
Solution
The battery pack may be dead. Recharge
or replace the battery pack
The battery pack may not be installed
correctly. Remove the battery pack and
install it again.
The battery pack life is finished. Replace
the battery pack with a new one.
Make sure you are using the same
frequency and QT/DQT as the other
members in your group.
Other group members may be too far
away.
Make sure you are within range of the
other transceivers.
Change the QT/DQT.
Be sure to change the tone on all
transceivers in your group.
Channel programming is empty.
Frequency Range
Channel Capacity
Frequency Spacing
Working Voltage
Frequency Stability
Operating Temperature Range
Antenna Impedance
Dimension excl Antenna
(L×W×H)
Weight (including Antenna and
Battery)
Battery Capacity
Battery Operating Time Average
Output power
Modulation Mode
Maximum Frequency Deviation
Audio Distortion
Residual frequency modulation
Adjacent Channel Power
Spurious and Harmonic Wave
446MHz & 464MHz license-free,
(400-470MHz licensed)
16
25kHz/12.5kHz
7.4V
±2.5ppm
-25
℃
~
＋
55
℃
50Ω
113mm×57mm×34.5mm
200g
1100mAH
30 hours on 5:5:90 duty cycle
500mW license-free, (4W licensed)
16kΦF3E/8kΦF3E
±5kHz/±2.5kHz
≤5%
-40dB /-35dB
-70dB /-60dB
-36dBm<1GHz -30dBm>1GHz
GENERAL
Receiving Sensitivity
Adjacent Channels Selectivity
Intermediation
Spurious Response
SNR
Audio Output Power
Audio Distortion
≤0.18uV/0.22uV
≥70dB/60dB
≥60dB
≥70dB
≥50/45dB
0.5W
≤5%
RECEIVER
TRANSMITTER