LMX2820: LMX2802 - Improve lock time

Tool/software:

Hi

I'm using the LMX2820 with instant calibration.

The Fosc is 30MHz

I'm using bias capacitor of 0.47uF, so INSTCAL_DLY = 2.5 x 30 = 75

For the first 5650MHz calibration, I'm using the N divider, but after the calibration is done, i switch to external mixer setup.

I'm getting lock time of 50uSec (7050MHz to 7150MHz). I read on the forum that people got a lock time of 10uSec and I wonder how I can improve it?

I'm following these steps for calibration:

I start with:

01,57A0
01,57A1

Then:

7A,0000
79,0000
78,0000
77,0000
76,0000
75,0000
74,0000
73,0000
72,0000
71,0000
70,FFFF
6F,0000
6E,001F
6D,0000
6C,0000
6B,0000
6A,0000
69,000A
68,0014
67,0014
66,0028
65,03E8
64,0533
63,19B9
62,1C80
61,0000
60,17F8
5F,0000
5E,0000
5D,1000
5C,0000
5B,0000
5A,0000
59,0000
58,03FF
57,FF00
56,0040
55,0000
54,0040
53,0F00
52,0000
51,0000
50,00C0
4F,0016
4E,0001
4D,0608
4C,0000
4B,0000
4A,0000
49,0000
48,0000
47,0000
46,00FE
45,0011
44,0020
43,1000
42,003F
41,0000
40,4080
3F,C350
3E,0000
3D,03E8
3C,01F4
3B,1388
3A,0000
39,0001
38,0001
37,0002
36,0000
35,0000
34,0000
33,203F
32,0080
31,0000
30,4180
2F,0300
2E,0300
2D,5555
2C,5555
2B,4000
2A,0000
29,0000
28,0000
27,C000
26,0000
25,0500
24,00BC
23,3100
22,0010
21,0000
20,1001
1F,0401
1E,B18C
1D,318C
1C,0639
1B,8001
1A,0DB0
19,0624
18,0E34
17,1102
16,E2BF
15,1C64
14,272C
13,2120
12,0010
11,15C0
10,171E
0F,2001
0E,3001
0D,0038
0C,0408
0B,0602
0A,0000
09,0005
08,C802
07,0000
06,0A43
05,0032
04,4204
03,0041
02,8097

00,4030

Wait 100mSec

00,4020

Now the calibration is done, the PLL is locked on 5650MHz.

I switch to external mixer and 7050MHz output:

39,0000
0F,2601
2C,0000
2D,0000
24,00EB
2A,0000
2B,0000
00,4020

And then to 7150MHz output:

2C,5555
2D,5555
24,00EE
2A,0000
2B,4000
00,4020

Thank you