Specifications

3.3 Test cables
When the DUT is tested apart from the instrument, it is necessary to extend the test ports
(UNKNOWN terminals) using cables. If the cables are extended without regard to their length, it will
cause not only a measurement error, but will also result in bridge unbalance making measurement
impossible. This section provides a guideline for choosing or fabricating test cables.
3.3.1 Agilent-supplied test cables
Agilent Technologies supplies 1, 2, and 4 m cables as listed in Table 3-2. The Agilent 16048A and
16048E test leads are manufactured using the same cable material. The Agilent 16048G and 16048H
test leads employ a high-quality cable to insure low-loss transmission characteristics that specifically
match the 4294A. The cable length and the usable frequency range must be considered when select-
ing a test cable. Agilent's instruments can minimize additional measurement errors because the
characteristic of Agilent's test cables are known. Though the cable compensation function is effec-
tive for Agilent-supplied test cables, the measurement inaccuracy will increase according to the
cable length and the measurement frequency.
Table 3-2. Agilent-supplied test cables
* Note: The 4284A is obsolete product.
3-10
Test cable Cable Maximum Connector Applicable instruments
length frequency type
16048A 1 m 30 MHz BNC 4263B, 4268A, 4284A*, 4285A,
16048-65000 SMC 4288A, E4980A, E4981A
16048D 2 m 30 MHz BNC 4263B, 4268A, 4284A*, 4285A,
4288A, E4980A, E4981A
16048E 4 m 2 MHz 4263B, 4284A, E4980A
16048G 1 m 110 MHz 4294A
16048H 2 m 110 MHz 4294A