Comtech EF Data DT-4500-A Series - Manual (Page 34)

DT-4500A Series Downconverters Revision 1
Introduction MN-DT4500A
1–10
1.4.2 DT-4503/E-A C-Band Downconverter
Characteristic Specification
Frequency Range DT-4503/E-A 4500-4800 MHz
Conversion Dual, No Inversion
Step Size 125 kHz standard, 1kHz optional
Preset Channels 32 Frequencies
Stability over Time ± 1 x 10 -9 /Day
Stability Over Temp ± 1 x 10 -8 0-50°C (32-122°F)
RF Input Noise Figure 11 dB Maximum at 0 dB Attenuation
Level -45 dBm Typical
Impedance 50Ω
Return Loss 20 dB min. with RF/IF Connector Module
IF Output Output Level +20 dBm at 1 dB Compression
Range 52-88 or 104-176 MHz, optional 50-80 MHz or 100-180 MHz (see *Note)
Intermodulation -60 dBc @ 0 dBm Output SCL
Non-carrier Spurious -80 dBm
Carrier Spurious -65 dBc @ 0 dBm Output
Return Loss 23 dB Minimum with RF/IF Connector Module
Impedance 50Ω or 75Ω
Transfer Gain 45 dB ± 2 dB
Attenuation Adjust 0-20 in 0.25 dB Steps
0.1 dB Steps Optional
Gain Stability ± 0.25 dB/Day
Ripple 70MHz IFCF: ±0.25 dB (±18 MHz), optional ±20 MHz (see *Note)
140 MHz IFCF: 0.75 dB (±36 MHz), optional ±40 MHz (see *Note)
Slope 0.05 dB/MHz
Image Rejection -80 dB Inband
AM to PM 0.1 o . / dB for Output up to –5 dBm
IF Bandwidth 36 or 72 MHz, optional 40 or 80 MHz (see *Note)
External Reference Input 5 or 10 MHz @ +3 dBm
Optional 10 MHz Rear Panel Reference Output
Group Delay Linear Group Delay 0.03 ns/MHz
Parabolic Delay 0.01 ns/MHz 2
Group Delay Ripple 1.0 ns Peak-to-Peak
Phase Noise Parameter Limit (dBc/Hz) Typical (dBc/Hz)
100 Hz -80 -83
1 kHz -89 -92
10 kHz -95 -97
100 kHz -105 -109
1 MHz -120 -124
Remote Control (Rear Panel) Comm Port EIA-485 or EIA-232
LED Indicators
(Front Panel)
Power On Green LED
Output Enable Yellow LED
Remote Yellow LED
On Line Yellow LED
Fault Red LED
Stored Fault Red LED