What is the maximum safe input power for the JD745A?

The JDSU JD745A has a maximum safe RF input power rating of +30 dBm and a maximum rated DC voltage limit of ±50 V DC.

What measurement points and ranges are supported by the JD785B for cable testing?

The JD785B supports selectable data points of 126, 251, 501, 1001, and 2001. Its VSWR measurement range spans from 1.0 to 65.0, with a reflection/return loss resolution of 0.01 dB.

What are the frequency stability specifications of the JD785B?

The JD785B features a frequency accuracy of ±1.0 ppm, an annual frequency aging rate of ±1.0 ppm, and a temperature stability of ±1.0 ppm across its full operating temperature range of -10 °C to 55 °C.

JDSU CellAdvisor Series Base Station Analyzers

2 models with full specifications from JDSU.

The JDSU CellAdvisor series consists of portable, handheld analyzers engineered for the installation and maintenance of wireless base stations. This page details the capabilities of the JD745A and JD785B models, which are built to assist field engineers and technical technicians in testing wireless infrastructure. These rugged instruments combine vital functions—such as spectrum analysis, cable and antenna testing, and power measurements—into unified handheld platforms. By presenting technical specifications side-by-side, this guide helps buyers and operators select the optimal CellAdvisor instrument for their cell site testing and verification requirements.

JD745A Spectrum Range: 100 kHz to 4.0 GHz
JD785B Spectrum Range: 9 kHz to 8 GHz
JD785B Cable/Antenna Range: 5 MHz to 6 GHz
Display Size: 8.0-inch (800 x 600)
JD745A Weight: 3.2 kg
JD785B Weight: 3.7 kg

Models in this series

Model	Type	Battery Operating Time	Cable and Antenna Analyzer Frequency Range	Dimensions (W×H×D)
JD785B	*misc	> 3.0 hours (typical)	5 MHz to 6 GHz	290 mm x 188 mm x 95 mm
JD745A	*misc	> 3 hours (typical)	5 MHz to 4.0 GHz	290 mm × 195 mm × 75 mm

Common Architecture and Interface Features

Both the JD745A and JD785B share a robust, field-ready design featuring an 8.0-inch color touchscreen display with an 800 x 600 resolution. The JD785B incorporates a transflective TFT screen, ensuring visibility under high ambient light conditions.

In terms of connectivity, both instruments provide standard physical interfaces to simplify data management and integration. They each offer two USB Host (Type A) ports, one USB Client/Device (Mini-B) port, an RJ-45 LAN connection, a BNC external 10 MHz reference input, and an SMA connector for GPS antennas. Additionally, the JD785B adds a dedicated external trigger BNC input and a 3.5 mm headphone jack.

Spectrum and Cable Analysis Capabilities

The primary differentiator between these models lies in their frequency coverage and functional integration:

JDSU JD785B: This model features a spectrum analyzer frequency range of 9 kHz to 8 GHz with a 1 Hz frequency resolution. It includes an integrated cable and antenna analyzer operating from 5 MHz to 6 GHz (10 kHz resolution). Supported measurement modes include Reflection (Return Loss, VSWR), Distance-to-Fault (DTF), Cable Loss, and 2-Port Transmission, with sweep data points ranging from 126 to 2001.
JDSU JD745A: This unit functions as a base station analyzer covering a spectrum range of 100 kHz to 4.0 GHz. It offers adjustable resolution bandwidth (RBW) from 10 Hz to 3 MHz and video bandwidth (VBW) from 1 Hz to 3 MHz, with a typical displayed average noise level (DANL) of -155 dBm/Hz when the preamplifier is active between 10 MHz and 2.4 GHz.

Physical, Environmental, and Power Profiles

Designed for field operations, both models operate in demanding environments down to -10 °C. However, their physical and electrical specifications differ slightly:

JDSU JD745A: Weighs 3.2 kg and measures 290 mm x 195 mm x 75 mm. It operates at temperatures up to +50 °C and utilizes a rechargeable Li-Ion battery. The battery charge time is under 4 hours when the device is powered off, and the instrument achieves a warm-up time of 5 minutes.
JDSU JD785B: Weighs 3.7 kg (including battery) with dimensions of 290 mm x 188 mm x 95 mm. It operates in temperatures up to 55 °C, features a nominal power consumption of 29 W, and supports user interfaces in nine languages, including English, French, German, Spanish, Russian, Chinese, Japanese, and Korean.

Frequently asked questions

What is the maximum safe input power for the JD745A?: The JDSU JD745A has a maximum safe RF input power rating of +30 dBm and a maximum rated DC voltage limit of ±50 V DC.
What measurement points and ranges are supported by the JD785B for cable testing?: The JD785B supports selectable data points of 126, 251, 501, 1001, and 2001. Its VSWR measurement range spans from 1.0 to 65.0, with a reflection/return loss resolution of 0.01 dB.
What are the frequency stability specifications of the JD785B?: The JD785B features a frequency accuracy of ±1.0 ppm, an annual frequency aging rate of ±1.0 ppm, and a temperature stability of ±1.0 ppm across its full operating temperature range of -10 °C to 55 °C.