Multifunction Power Meters
Dual Sensor Display
The Model 4421A is a Multifunction Power Meter to be used in combination with Bird’s Precision Power Sensors to display RF power readings with up to 0.5% accuracy. This intuitive display unit clearly identifies the Forward and Reflected power measurements within the RF path. In addition, return loss readings can also shown
to provide additional insight into the RF system being monitored.
The 4421A is the next generation replacement for the industry standard Model 4421. Building upon the original model’s high level of accuracy and its ease of use, the new 4421A enhances the meter’s functionality by utilizing a smaller/lighter design, and by providing the ability to have dual sensor inputs.
PRODUCT FEATURES
- Compatible with the full line of Bird's 402x-, 702X- and 703x-series sensors.
- Automatic sensor detection for seamless integration.
- Large 9.7" full color LCD touchscreen display for easy readability.
- Dual sensor option expands measurement capabilities.
- Compact, lightweight and portable design enhances functionality.
FUNCTIONS
- Forward Power in W or dBm
- Reflected Power in W or dBm
- Return Loss in VSWR, RL, or Reflection Coefficient
Product Selection Guide
| Model Number |
# of Sensors |
# of Sensor Channels |
Remote Computer Interfaces |
| 4421A-10-00-0 |
Single 402x Sensor |
1 |
None
|
| 4421A-20-00-0 |
Dual 402x Sensors |
2 |
None
|
| 4421A-10-11-0 |
Single 402x Sensor |
1 |
RS-232, LAN |
| 4421A-20-11-0 |
Dual 402x Sensors |
2 |
RS-232, LAN |
| 4421A-12-11-1 |
Single 402x Sensor
*Dual 702x / 703x Sensors |
2 |
RS-232, LAN |
* 702x/703x Sensors are currently supported for Average Power measurements. Pulse Power parameter measurements will be added with a free, in-field installable software update by the end of 2023.
Item Name
Multifunction Power Meter
Compatible Bird Power Sensors
4021, 4022, 4023, 4024, 4025, 4027 Series, 4028 Series, 702x Series, and 703x Series
Power Range
Sensor dependent
Frequency Range
Sensor dependent
Sensor Channels
Model dependent: 1 or 2
Return Loss Display
0 to 40 dB
Display
9.7 in TFT full color LCD with touch screen
AC Power
100-240 VAC, 50-60Hz, 30 W
Fuse Rating: 1A, IEC (5 x 20 mm), Time-Delay
Batteries
Type: Internal, rechargeable
Life: Up to 7 hours
Changer: Built-in. Approximately 4 hours to fully recharge.
Humidity
95% max (noncondensing)
Temperature
Operating: 0 to 40 °C
Storage1
-10 to 50 °C, < 1 month
-10 to 35 °C, < 6 months
-10 to 25 °C, > 6 months
1 - Storage temperature limited by battery specification. Storage outside this range may degrade battery performance. For best performance, a full recharge is recommended every 6 months or if stored below 0 °C.
Dimensions
10.6 in x 9.7 in x 3.6 in
(269 mm x 246 mm x 91 mm)
Certifications
CE Compliant
Shock and Vibration: MIL-PRF-28800F Class 4