Spec Sheet

500W Transmitter / Translator
325A/327A
425A/427A
Specifications subject to change without notice.
Visual Performance
Power Output (Peak) 500 Watts
Output Impedance 50 Ohms
Output Connector Type “N”
Frequency Range (325A/327A) 54 to 88 MHz
Frequency Range (425A/427A) 174 to 216 MHz
Carrier Stability (Transmitters
or Translators with FCR) ±250 Hz
Frequency Translation Stability
(Translators) ±1 kHz
Regulation of RF Output Power 3%
Variation of Output 2%
(over one frame)
Sideband Response
-1.25 MHz and below -20 dB
-0.75 to -0.5 MHz ±0.5 dB, -2 dB
-0.5 MHz to +3.58 MHz ±0.5 dB
+3.58 to +4.18 MHz ±0.5 dB, -1 dB
Frequency Response vs. Brightness ±0.5 dB
Visual Modulation Capability 1%
(Transmitters)
Differential Gain 5%
Incidental Phase Modulation ±3°
Linearity (Low Frequency) 5%
Differential Phase ±3°
Signal-to-Noise Ratio 55 dB
2t K-Factor 2%
Envelope Delay
Transmitters Per FCC Standard
Translators ±40 ns
Video Input (Transmitters) 75 Ohms
Harmonic Radiation -60 dB
Intermodulation Products -52 dB (red field)
Spurious -60 dB
(>3 MHz from channel edge)
Noise Figure w/input Preamp 4.5 dB (max.)
(Translators)
Input Dynamic Range (Translators) -65 to -25 dBm
Aural Performance
Power Output (Average) 50 Watts
Distortion 0.5%
FM Noise -60 dB
AM Noise -55 dB
Aural to Visual Separation 4.5 MHz, ±100 Hz
(Transmitters)
Composite Audio Input (Transmitters)
Input Level 1V peak, nominal
Input Impedance 75 Ohms, unbalanced
Frequency (±0.5 dB response) 30 Hz to 120 kHz
Monaural Audio Input (Transmitters)
Input Level 0 to +10 dBm
Input Impedence 600 Ohms, balanced
Frequency Range (±0.5 dB resp.) 30 Hz to 15 kHz
Pre-emphasis 75µs
Subcarrier Input (Transmitters)
Input Level 1V peak, nominal
Input Impedance 75 Ohms, unbalanced
Frequency Range (±0.5 dB resp.) 20 kHz to 120 kHz
Options
Automatic Station Identifier
Spare Parts Kit
Modulator Option (Translators)
Remote Preamplifier (Translators)
UHF Frequency Correcting Receiver
(FCR) Option (Translators)