Giga-tronics 8003 - Directional Bridges; Table A-3: Directional Bridge Selection Guide; A.2.2 Directional Bridges

8003 Precision Scalar Analyzer
A-4 Manual 20791, Rev. C, June 2001
A.2.2 Directional Bridges
The 80500 CW Directional Bridges are designed specifically for use with Giga-tronics power meters to
measure the Return Loss/SWR of a test device. Each bridge includes an EEPROM which has been
programmed with Identification Data for that bridge.
The Selection Guide in Table A-3 shows primary specifications. Additional specifications are:
Bridge Frequency Response: Return loss measurements using the 8003 can be frequency
compensated using the standard Open/Short supplied with the
bridge.
Insertion Loss: 6.5 dB, nominal, from input port to test port
Directional Bridge Linearity Plus
Zero Set & Noise vs. Input Power:
(50 MHz, 25°C
±
5°C, 0 dBm Ref.) +27 dBm (0.5 W)
Weight: 80501: 340 g (12 oz)
80502: 340 g (12 oz)
80503: 198 g (7 oz)
80504: 198 g (7 oz)
Directional Bridge Accessories: An Open/Short is included for establishing the 0 dB return loss
reference during path calibration.
Dimensions: 80501: 76 x 50 x 28 mm (3 x 2 x 1 1/8 in)
80502: 76 x 50 x 28 mm (3 x 2 x 1 1/8 in)
80503: 19 x 38 x 29 mm (3/4 x 1 1/2 x 2 1/8 in)
80504: 19 x 38 x 29 mm (3/4 x 1 1/2 x 2 1/8 in)
Table A-3: Directional Bridge Selection Guide
Bridge Selection Guide
Model
ModelModel
Model
Freq. Range/
Powe r
Range
Max.
Max. Max.
Max.
Power
PowerPower
Power
Power Linearity
4
(Frequency >8 GHz) Input
InputInput
Input Tes t
Test Tes t
Test
Port
PortPort
Port
Direct-
tivity Wgt
WgtWgt
Wgt VSWR
VSWRVSWR
VSWR
Precision CW Return Loss Bridges
80501
10 MHz to 18
GHz
-35 to +20 dBm
+27 dBm
(0.5W)
-35 to +10 dBm ±0.1 dB
+10 to +20 dBm ±0.1 dB
±0.005 dB/dB
Type N(f)
50 Ω
Type N(f)
50 Ω
38 dB
0.340 kg
<1.17:0.01 - 8 GHz
<1.27:8 - 18 GHz
80502 APC-7(f)
50 Ω
40 dB <1.13:0.01 - 8 GHz
<1.22:8 - 18 GHz
80503 10 MHz to 26.5
GHz
-35 to +20 dBm
SMA(f)
50 Ω
SMA(f)
50 Ω
35 dB <1.22:0.01 - 18 GHz
<1.27:8 - 26.5 GHz
80504 10 MHz to 40
GHz
-35 to +20 dBm
Type K(f)
50 Ω
Type K(f)
50 Ω
30 dB 0.198 kg <1.35:0.01 - 26.5 GHz
<1.44:26.5 - 40 GHz
DIRECTIONAL BRIDGE MEASUREMENT ERROR
Power (dBm)
Measurement Error (dB)
.30
.25
.20
.15
.10
.05
0.00
20 15 10 5 -5 -10 -15 -20 -25 -30 -35 -40