T-680 Series PRO PLUS
DYNEX
®
III UHF Bodypack Transmitter Specifications
Operating Frequency:
494-608, 614-806 MHz
RF Frequency Stability:
±
0.002%
RF Output Power:
150 mW, nominal
Spurious Radiation:
40 dB below carrier, minimum; typically 55 to 60 dB below carrier
Audio Processor:
DYNEX
®
III
Acoustic Input Range:
Maximum gain typically 112 dB SPL for onset of compression;
maximum acoustic input: 143 dB SPL
Controls:
Power on/off, microphone on/off, microphone gain
Indicator:
Audio compression
Modulation Limiting (Compressor):
Per FCC requirements; “soft” compressor action, 25 dB
range; typically system distortion is less than 0.4% at 25 dB compression
Antenna:
Internal dipole
Battery:
9-V alkaline, Duracell MN1604 recommended
Length:
Varies by model, from 9.85 in (25 cm) to 10.75 in (27.3 cm)
Weight:
Varies by model, from 9 oz (256 g) to 13.5 oz (385 g), including battery
UHF PRO PLUS System Specifications
Operating Frequency:
494-608, 614-806 MHz
Working Range:
1,500 ft under good conditions; 500 ft under typical conditions with standard
whip antennas
Emission/Modulation:
Direct FM, crystal controlled, 60K0F3; 75-kHz maximum deviation
AF Frequency Response:
Depends upon microphone element and electronics; 90 Hz to 15
kHz,
1.5 dB, 120 Hz to 12 kHz,
0.75 dB (units include highpass filter to minimize handling
noise; extended low-frequency response available on special order)
Total Harmonic Distortion:
<0.25%, 400 Hz, nominal input level
Intermodulation Distortion:
<0.25% (SMPTE 60/7,000 Hz, 4:1)
Ultimate S/N:
Microphone off: 101 dB (flat), minimum (108 dB typical, A-weighted.
Microphone on: varies by element type and gain setting, typically over 100 dB (A-weighted) at
normal gain settings
Pre/De-Emphasis:
45
µ
s
Audio Processor:
DYNEX
®
III
Dynamic Range:
Varies by element type and gain setting; typically over 100 dB; over 125 dB
with gain adjustment
AF Output Connection:
3-pin XLR, balanced, transformer isolated
Maximum AF Output
Line: +15 dBm (600
Ω
)
Mic: –15 dBm
AF Output Adjustment Range:
30 dB in both mic and line settings
AF Output Impedance
Line: 50
Ω
Mic: 150
Ω
Monitor Output:
Front-panel
1/4
-in mono/stereo phone jack
Transmitter and Receiver Operating Environment:
–20°C to +60°C
12
Model T-677 PRO PLUS DYNEX
®
III