Comtech EF Data DT-4500-A Series - Manual (Page 32)

DT-4500A Series Downconverters Revision 1
Introduction MN-DT4500A
1–8
• Prime Power Switch – The on/off prime power switch is located on the rear of the
chassis adjacent to the prime power input connector. The power switch contains a filter
and dual fuse. The dual fuse is rated for 2 Amps. The DT-4500A is provided with a six-
foot AC power cord.
• Exhaust Fan – The internally mounted exhaust fan vents through the rear panel for
chassis cooling.
• External Interface Connectors – Connectors provide operational communications,
connection of external reference, redundant operation, and remote monitor and control
of the DT-4500-A.
1.4 Summary of Specifications
*Note: Contact Comtech EF Data with specific requirements.
1.4.1 DT-4503/C-A C-Band Downconverter
Characteristic Specification
Frequency Range DT-4503/C-A 3400-4200 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
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)