Agilent Technologies 4294A Specifications download pdf (Page 98)

Figure 5-33. Measurement result

Balanced cable measurement

A balun transformer is required for measuring balanced cable because the instrument’s UNKNOWN

terminal is unbalanced. Refer to the next paragraph titled “Balanced device measurement” for

details of measurement method. Figure 5-34 shows measurement setup for balanced cable. Agilent

16314A balanced/unbalanced 4-terminal converter can be used to measure balanced cables from

100 Hz to 10 MHz using an auto balancing bridge instrument. For measurement using a network

analyzer, the 16315A, 16316A and 16317A are available. These converters have different character-

istic impedance to allow impedance matching with DUT (cable) impedance of 50 Ω, 100 Ω and 600

Ω, respectively, as shown in Table 5-4.

Table 5-4. 16314A, 16315A, 16316A and 16317A characteristic impedance

Figure 5-34. Balanced cable measurement setup

5-24

Converter Characteristic impedance Applicable instrument

Unbalanced Balanced

side side

16314A 50 Ω 50 Ω Auto balancing bridge instrument

16315A 50 Ω 50 Ω Network analyzer

16316A 50 Ω 100 Ω

16317A 50 Ω 600 Ω

1 2 ... 93 94 95 96 97 98 99 100 101 102 103 ... 125 126

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Agilent Technologies 4294A Specifications Page 98