The 85518A 4-in-1 mechanical calibration module combines an open, short, load, and through in a compact unit. The product is small, easy to handle, and light weight. The through allows users to easily calibrate non-insertable devices, such as a cable or filter with male-male connectors. During the "thru" part of the calibration, the 85518A through can be used.

• Type-N (m), 50 ohm, open, short, load, and through
• DC to 18 GHz
• Open phase error: 0 to 6 GHz ≤ 2.0 deg, 6 to 9 GHz ≤ 3.0 deg, 9 to 18 GHz ≤ 4.0 deg
• Short phase error: 0 to 6 GHz ≤ 1.5 deg, 6 to 9 GHz ≤ 2.5 deg,9 to 18 GHz ≤ 3.0 deg
• Load return loss: 0 to 6 GHz ≥ 42 dB, 6 to 9 GHz, ≥ 35 dB, 9 to 18 GHz, ≥ 32 dB
• Dimensions: H x W x D approx 106 x 72 x 22 mm