VIAVI UC-584 Series Transponder Antenna Coupler for ERP and MTL Testing
L-Band transponder antenna couplers for FAR Part 43 Appendix F ERP and MTL testing, with >20 dB isolation, for bottom and top aircraft antennas.
- Frequencies
- 1030 MHz, 1090 MHz
- Return Loss
- >7.71 dB
- Insertion Loss
- 0.6 dB ±0.5 dB
- Repeatability
- <1 dB
Overview
The VIAVI UC-584 Series Transponder Antenna Couplers are used for FAR Part 43 Appendix 'F' ERP (Effective Radiated Power) and transponder MTL (Minimum Trigger Level) testing in high multi-path ramp and hangar environments. The coupler mounts directly over the aircraft transponder antenna, and an integral positioning slot keeps placement consistent, which improves measurement repeatability and shortens test time.
The coupler provides more than 20 dB of attenuation. This reduces the chance that airborne TCAS systems and air traffic controllers will see transponder altitude replies from the unit under test during test conditions. It also provides shielding for ADS-B performance testing and UUT parametric tests. How well this works depends on the distance from the ADS-B ground station to the test site and on any shielding in the hangar.
Models
The UC-584 has a toggle-action clamping grip that secures the coupler to the bottom antenna. The UC-584S top-mount coupler has a hook and can be placed on the upper antenna with a pole from the ground, a ladder or scaffolding, so the operator does not need to climb onto the fuselage. Both models fit most 'Shark Fin' L-Band antennas and are available in single- and dual-antenna kit configurations.
Compatibility
The couplers connect to the VIAVI IFR6000, IFR6015 and APM-424(V)5 flight line test sets, the VIAVI IFF-45TS bench test set, or any other suitable transponder test set.
Models in this series
| Model | Description | |
|---|---|---|
| UC-584 |
VIAVI UC-584 Universal Transponder Antenna Coupler
Universal L-Band transponder antenna coupler with clamping grip for the bottom antenna, providing >20 dB isolation for ERP and MTL tests |
Details → |
| UC-584S |
VIAVI UC-584S Top Mount Transponder Antenna Coupler
Top mount L-Band transponder antenna coupler placed on the upper antenna with a pole, providing >20 dB isolation for ERP and MTL tests |
Details → |
Key Features
- Reliable FAR Part 43 Appendix 'F' ERP and MTL testing in high multi-path environments
- Provides >20 dB of antenna isolation for Mode S transponder altitude and diversity tests
- Provides shielding for ADS-B performance testing UUT parametric tests
- Reduces interference with air traffic control and nearby aircraft
- Integral positioning slot for repeatable measurements
- Quick action antenna grip/release action (UC-584)
- Hook for easy top mount, pole placement (UC-584S)
- Dual antenna kit configuration
- Rugged design for ramp use
- Fits most 'Shark Fin' L-Band antennas
- Universal design works with any suitable transponder test set
Specifications
| Frequencies | 1030 MHz, 1090 MHz |
|---|---|
| Return Loss |
>7.71 dB
at both the antenna under test input and coupler input |
| Insertion Loss |
0.6 dB ±0.5 dB
typical |
| Repeatability | <1 dB |
| Isolation | >20 dB |
| Connector | TNC Female |
|
Dimensions
UC-584, UC-584S |
8.2 in x 5.75 in x 5.25 in (20.9 cm x 14.6 cm 13.3 cm)
Product page lists depth as 8.25 inches (20.9 cm); datasheet value used |
|---|---|
|
Weight
UC-584, UC-584S |
2 lbs (0.9 kg) |
|
Width
UC-584 |
3.9 in (9.9 cm) |
|---|---|
|
Thickness
UC-584 |
0.325 in (0.825 cm) |
|
Height
UC-584 |
2.9 in (7.37 cm)
Product page states max. antenna height is 2.7 in; datasheet value used |
|
Width
UC-584S |
3.9 in (9.9 cm) |
|
Thickness
UC-584S |
0.25 in. (0.635 cm) |
|
Height
UC-584S |
3.75 in. (9.52 cm) |
|
UC-584 L-Band Coupler (w/ clamping), P/N 87431
112350, 112349 |
Qty 1 (single kit 112350), Qty 1 (dual kit 112349) |
|---|---|
|
UC-584s L-Band Coupler (top mount), P/N 142094
112350, 112349 |
Qty 0 (single kit 112350), Qty 1 (dual kit 112349) |
|
Coaxial Cable (25 ft) (TNC-TNC), P/N 62462
112350, 112349 |
Qty 1 (single kit 112350), Qty 1 (dual kit 112349) |
|
Coaxial Cable (25 ft) (TNC-TNC, right angle), P/N 141131
112350, 112349 |
Qty 0 (single kit 112350), Qty 1 (dual kit 112349) |
|
Soft Case, P/N 142158
112350, 112349 |
Qty 1 (single kit 112350), Qty 1 (dual kit 112349) |
|
ID Card, P/N 139823 (single) / 139824 (dual)
112350, 112349 |
Qty 1 (single kit 112350), Qty 1 (dual kit 112349) |
|
Application Notes, P/N 89148
112350, 112349 |
Qty 1 (single kit 112350), Qty 1 (dual kit 112349) |
|
Instruction Sheet, P/N 92715
112350, 112349 |
Qty 1 (single kit 112350), Qty 1 (dual kit 112349) |
Applications
- FAR Part 43 Appendix F transponder ERP testing
- Transponder MTL testing
- Mode S transponder altitude and diversity tests
- ADS-B performance and compliance testing
- Flight line and hangar avionics maintenance
Options & Accessories
| Option | Description |
|---|---|
| 112350 | UC-584 Coupler Kit, single antenna |
| 112349 | UC-584 Coupler Kit, dual antenna — Includes both the UC-584 clamping coupler and the UC-584S top-mount coupler |
| 142094 | UC-584S Top Mount Transp. Antenna Coupler — Can be ordered separately or is included with the UC-584 dual antenna Coupler Kit |
| 90106 | Kit, Antenna Coupler Pole, 8 ft. w/ D Ring — Optional accessory |