General Performance Features
N5181B-UNZ 快速切換
N5181B-UNX 低相位噪聲
N5181B-UNY 增強的低相位噪聲性能
N5181B-1EA 大輸出功率
N5181B-1EQ 小功率（< -110 dBm）
N5181B-1ER 靈活的參考輸入（1 ～ 50 MHz）
N5181B-302 Avionics License
N5181B-099 期限延長的許可證密匙升級能力
Frequency Range
N5181B-503 9 kHz 至 3 GHz 頻率范圍
N5181B-506 9 kHz 至 6 GHz 頻率范圍
Connector Configuration
N5181B-1EM 將所有連接器移至后面板
Calibration Documentation
N5181B-UK6 Commercial calibration certificate with test data
N5181B-A6J ANSI Z540-1-1994 校準
N5181B-AMG 校準 + 不確定度 + 保護頻段（認證）
Analog Modulation
N5181B-UNW 窄脈沖調(diào)制
N5181B-UNT 調(diào)幅、調(diào)頻、相位調(diào)制
N5181B-320 脈沖序列發(fā)生器，固定許可證
N5181B-303 多功能函數(shù)發(fā)生器
Additional Features
N5181B-006 儀器安全特性和可拆卸存儲卡
Documentation
N5181B-ABJ Japan - Japanese printed users guide
Accessories
N5181B-AXT Hard transit case
1CM110A Rack mount flange kit 88.1mm H (2U) - two flange brackets, four hole plugs, Palette 2015
1CN106A Handle kit 88.1mm H (2U) - two front handles, Palette 2015
1CP104A Rack mount flange and handle kit 88.1mm H (2U) - brackets, handles, hole plugs, Palette 2015
1CR112A Rack Slide Kit, Mounting lengths 279.4-406.4mm, Palette 2015
1CM010A Rackmount Flange Kit 88.1mm H (2U) - Two Flange Brackets, Four Hole Plugs
1CN006A 把手套件 88.1 毫米（高）（2U）--兩個前把手
1CP004A Rackmount Flange and Handle Kit 88.1mm H (2U) - Brackets, Handles, Hole Plugs
1CR012A Rack Slide Kit, Mounting lengths 279.4-406.4mm
N5181B-CVR Front panel cover
